When the legendary figures behind This Is Spinal Tap step on stage Friday night in Vancouver, the amps won't be cranked to 11. And shaggy-mopped Nigel, David and Derek won't be reprising the headbanger roles that gave perennial life to Rob Reiner's 1984 mockumentary.

The amps won't be turned up to 11 for Spinal Tap's reunion tour. Michael McKean, Christopher Guest and Harry Shearer the actors who portrayed the faux heavy metal rock band in the 1984 mockumentary This is Spinal Tap are leaving their wigs and costumes in their closets for the Unwigged and Unplugged tour.